Today I went to Spice Ace, a charming spice/herb store at 1821 Steiner between Sutter and Bush. Lovely airy store with super friendly and helpful staff. I bought more than I should have but everything was so tempting. They have testers for every product and have a great range of salts, sugars, fruit powders, spices, herbs, and more. The prices seem really reasonable. I've been buying from Whole Spice at the Oxbow in Napa but this is a closer alternative.
Spice Ace: http://www.spiceace.com/